Manufacture of monoazo-dyestuffs



Fatented Sept. 22, 1931 ems;

OF IC annmmnn momma), or BASEL, swrrzrmnnnn, ASSIGNOR T0 J; R. GEIGY s. A., or

,asnsnrreswrrznnnmn 1 ,MmwmomnRn-pn monoezo nyns'rur-rs No Drawing. ,Applicationfile'd June7, 1930,

This invention is. an improvement in or modification of that ---described in 7 the specification of the patent applicationfi'er; fNo. aezrsanmaoaemre;1929;

manufacture of new monoazo-dyestuffs 'by 'combinmg adiam-compound of an aryl or aralkyl ether of ortho-aininophenol ora-substitution'product thereof with an "N-arylsulc 1'0 vphmderi vative' of a 1-amino 8-naphthol-disulphonic'fa'c'itl. The" dyestuffs thus'obtained dye Wool and silk extremely charred-shades Very fast to light and fulling; and they are soluble in water with red to blue-red and in concen-' trated sulphuric acid 'with violet to blue colora-tion.

By the present invention dyestuffs which are analogous to those obtained by the process of with an Nearylsulpho derivatiye of :a ;'1--

amino 8-naphthol disulphonic aoid.

'The new dyestuifs obtained in 'thismanner resenrible in quality andffintthose which have.

been described in the aforesaid specification, giving red toblue-redftints :Very f as't to light 'andfulling. I I V (The following examples illustrate .the in veritionz'" .EvaamyziZe1 19.9 kilos of ortho-aniinopheny l orthotoly'l ether are dia-Zot ized'in the usual man ner. The dia-zo so'lutionis'poured while stirring, into an aqueous solution ofi 39l6' kilos ofl liloracetyl aniino-8 najjhthol-3vii-disul- 'phon'ie akiid and l'Okilos ofcrystallized sodium acetate. T-he solution is progressively neutralized by'addition of asolutiono'f sodiiun 'c'arbonate. Af er some hours thecoupfling is eomplete and the whole isfiltered and the'solidmatter dried. The dyestuff thus obtainedis'a' red powder. It dissolves in Water to a red blue soluti'onandin concentrated sulfuric acid to a red-brown-solution; It-dyes awooliandr silk 'awery clear blue-red tint which is veryffast to lightand' to fulling;

"In that-specification there is described a Serial No. 459,836; and Emma any 4,"1929.

"freeformthe dyestufi' 1 of this exam- -pleihasimostprobablythe following formula:

H .In this :ieziamiile, instead '\o f"ortho:-a1ninophenylsortho-tolylrether there may be used phenol or a, derivative thereof,isueh as orthoaniinophenylmieta-tolyl iQtlTQI ortho-nminophenyl-para-tolyl ether, ortho-aminophenyh para-chlorophenyl ether, ortho-aminophenylortho-chlorophenyl ether, orthdaminO- arachlorodiphenyl -ether, ortho-aniinophenylbenzyl ether, zmeta-amino paracresol-benzyl ether, l-chloro-2-a1ninophenylben2yl ether or the like. Instead of l-chloracetyl-amino-S- other arylor aralkyl-ethers yoffortho-aminoei naphthol-3 6-disulphonieacid there'may be used another acidyl-aroyl-l-amino-S naphthol-disulphonic. acid, such, for example, :as

l a'cetylaminoe8wnaphthol-3. 6- or 4 rB-disulphonic acid or benzoy'l-ior monochloro-ior dichlorobenzoyl 1 amino 8 naphthol 3 6- or 4 6-disulphonic acid.

Ea v amplef 2 A diazo-solution obtained in ordinary manner fr0m 21.2 kilos of meta-amino-para-cresolbemylether is introduced, while stirring, into an aqueoussolution of 41.9 kilos of-benzoyl 1 amino -18 --nap'htho'l-3 G-disulphonic acid and 30 :kilos of-orystallized sodium acetate at -0 5 G. The solution, is gradually neutralized by :addition :of a solution-of sodium carbonate The mass becomes first slimy, whereupon the dyestufi' separates out in crystalline state. After stirring for about ten hours-the mass is heated 'up,rfiltered and the solid matter dried. Theobtained dyestufi constitutes :ared po-wderwhich is soluble in water with blue-red and in 'con'centratedsuh phuric acid with dark blue-coloration. It dyeswo olzandfs i'lk of very clear blue-red tints which :are wery fast to light and fulling.

The dyestuff of this example has in its free form probably the following formula:

O'OHQ-CQHI OEl N %OOHI l H Boas SOIH H, I Example 3 diazo solution obta ned in ordlnary man p, p th01 3 egdisulphomcr acld ner from 19.9. kilos of ortho-aminophenylortho-tolylether is poured, while stirring, into an aqueous solution of 41.9 kilos of benzoyl- 1-amino-8-naphthol 8 6-disulphonic acid and "kilos of crystallized sodium acetate at 05 O. The solution is progressively neutralized by addition of asolutionof sodium carbonate. After stirring for some hours, the coupling is achieved and the whole is filtered and the solid matter dried. The obtained dyestuff constitutes a red powder which is soluble in water withblue-red and in concentrated sulphuric acid with reddish-blue coloration. It gives on wool and silk very clear blue-red tints of very good fastness to light and fulling. I

The dyestufi' of this example has in its free formprobably the following formula:

sour

What I claim is 1. A process for the manufacture of monoazo-dyestuffs, consisting in couplinga diazocompound of an ortho-aminophenol-ether of the following formula wherein R stands for phenyl of loenzyl and their homologues or halogen substitution products and Y for H, Cl and CH with an acidyl-1-amino-8-naphthol-disulphonic acid.

2. A process for the manufacture of monoazo-dyestuifs, consisting in coupling a diazocompound of an ortho-aminophenol phenylether with an acidyl-l-amino-8-naphthol-disulphonic acid.

3. A process for the manufacture of monoazo-dyestufls, consisting in coupling a ,dia'zo-compound of an ortho-aminophenolhenzyl-ether with an acidyl-I-a minO-S-naphthol-disulphonic acid.

4. A process for the manufacture of monoazo-dyestuifs, consisting in coupling a diazo-compound of an ortho-aminophenolbenZyl-ether with benzoyl 1 amino 8 azo-dyestuifs,consisting in coupling a diazo- 8 compound of meta-amino-para-presolbenzylether with benzoyl-l-amino-8-naphthol-3 1,6- disulphonic acid.

9. As new articles of manufacture, the

monoazo-dyestufl's obtained by coupling a diazo-compound of an ortho-aminophenolether of the following formula 7v products and Y for H, Cl and CH withan acidyl-l-amino-8-naphthol-disulphonic acid,

. saiddyestuifs constituting red powders soluble in water to a red-blue and in concentrated sulphuric acidto a blue solution and dyeing wool and silk very clear red to blue-red shades fast to fulling and light.

10. As new articles of manufacture, the monoazo-dyestuifs obtained by coupling a diazo-compound of an ortho-aminophenolphenyl-ether with an acidyl-1-amino-8-naphthol-disulphonic acid, said dyestuffs constituting red powders soluble in water to a redblue and in concentrated sulphuric acid to a blue solution and dyeing wool and silkvery clear red to blue-red shades fast to fulling and light.

11. As new articles of manufacture, the monoazo-dyestufls obtained by coupling a diazo scompound of an ortho-aminophenolbenzyl-ether with an acidyl-l-amino-S- naphthol-disulphonic acid, said dyestuffs constituting red powders soluble in water to a red-blue and in concentrated sulphuric acidto a blue solution and dyeing wool and silk very clear red to blue-red shades fast to fulling and light. v

112. As a new product of manufacture, the monoazo-dyestuif obtained by coupling a diazo compound of ortho-aminophenyl-orthotolylether with benzoyl-l-amino-Smaphthol- 3: 6-disulphonic acid, said dyestuffs constituting a red powder soluble in water with blue-red and in concentrated sulphuric acid with reddish-blue coloration and dyeing Wool and silk Very clear red to blue-red shades fast to fulling and light.

13. As a new product of manufacture, the 10 monoazo-dyestufi obtained by coupling a diazo-compound of meta-amino-para-cresolbenzylether with benz0yl-1-amino-8-naphthol-3: 6-disulphonic acid, said 'dyestufi constituting a red powder soluble in Water with blue-red and in concentrated sulphuric acid with dark blue coloration and dyeing wool and silk of very clear blue-red tints very fast to light and fulling'.

In Witness whereof I have hereunto signed my name this 27th day of May, 1930.

BERNHARD RICHARD. 

